CN110661702A - Link backup method and device and computer readable storage medium - Google Patents
Link backup method and device and computer readable storage medium Download PDFInfo
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- CN110661702A CN110661702A CN201810691880.XA CN201810691880A CN110661702A CN 110661702 A CN110661702 A CN 110661702A CN 201810691880 A CN201810691880 A CN 201810691880A CN 110661702 A CN110661702 A CN 110661702A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/22—Alternate routing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/24—Multipath
- H04L45/245—Link aggregation, e.g. trunking
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/28—Routing or path finding of packets in data switching networks using route fault recovery
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/66—Layer 2 routing, e.g. in Ethernet based MAN's
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Abstract
The embodiment of the invention discloses a link backup method, which is applied to the link backup of a layer two link system, wherein the layer two link system comprises the following steps: n layer two links; the N layer two links comprise a main link and at least one backup link, and N is an integer greater than 1; the method comprises the following steps: when detecting that the main link fails, acquiring state information of a backup link; determining an available backup link according to the state information of the backup link; and switching the current working link from the active link to the determined available backup link. The embodiment of the invention also discloses a link backup device and a computer readable storage medium.
Description
Technical Field
The present invention relates to communications technologies, and in particular, to a method and an apparatus for link backup, and a computer-readable storage medium.
Background
Many transmission devices (including devices such as base stations) have multiple ports, and in some cases with high reliability, these ports can be used for load sharing or backup to fully utilize resources. Such as: the LACP (Link aggregation control Protocol) technology may use a plurality of ports to be bound into one aggregation group, thereby performing load sharing and backup. Fig. 1 is a schematic structural diagram of a layer two multi-port backup system based on LACP, and as shown in fig. 1, the multi-port backup system includes: the multi-port device 101 comprises a plurality of ports, each port is connected with the convergence device 102, and the convergence device 102 converges information of each port and then transmits the converged information, so that multi-port load sharing and backup are realized.
At present, in the existing transmission Network, for example, some trunking networks, in order to ensure reliability, a base station accesses a core Network by moving and communicating two sets of transmission links that are backup to each other, and the two sets of transmission links are respectively formed by cascading layer Transport Network (PTN) devices. However, as can be seen from the layer two multi-port backup system shown in fig. 1, the existing LACP technology can only backup between multiple ports of two devices, cannot backup a cascaded link including multiple layer two devices, and is limited in use scenarios.
Disclosure of Invention
To solve the foregoing technical problems, embodiments of the present invention desirably provide a method and an apparatus for link backup, and a computer-readable storage medium, which can implement the backup of a cascade layer two-link.
The technical scheme of the invention is realized as follows:
the embodiment of the invention provides a link backup method, which is applied to the link backup of a layer two link system, wherein the layer two link system comprises the following steps: n layer two links; the N layer two links comprise a main link and at least one backup link, and N is an integer greater than 1; the method comprises the following steps:
when detecting that the main link fails, acquiring state information of a backup link;
determining an available backup link according to the state information of the backup link;
and switching the current working link from the active link to the determined available backup link.
The embodiment of the invention also provides a link backup device, which is applied to the link backup of a layer two link system, and the layer two link system comprises: n layer two links; the N layer two links comprise a main link and at least one backup link, and N is an integer greater than 1; the device comprises: a processor and a memory; wherein the content of the first and second substances,
the processor is configured to execute a link backup program stored in the memory to perform the steps of: when detecting that the main link fails, acquiring state information of a backup link;
determining an available backup link according to the state information of the backup link;
and switching the current working link from the active link to the determined available backup link.
An embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program is executed by a processor to implement the steps of any one of the methods described above.
The embodiment of the invention provides a link backup method, a device and a computer readable storage medium, wherein the method is applied to the link backup of a layer two link system, and the layer two link system comprises the following steps: n layer two links; the N layer two links comprise a main link and at least one backup link, and N is an integer greater than 1; the method comprises the following steps: when detecting that the main link fails, acquiring state information of a backup link; determining an available backup link according to the state information of the backup link; and switching the current working link from the active link to the determined available backup link.
By adopting the technical scheme, the link backup of the cascade type layer two link can be realized, each layer two link comprises at least one layer two device, and the problem that the backup can only be realized between two devices and multiple ports and the backup can not be carried out on the cascade type links of multiple devices in the prior art is solved.
Drawings
FIG. 1 is a schematic diagram of a LACP-based layer two multiport backup system;
FIG. 2 is a flowchart of a first embodiment of a method of link backup in an embodiment of the present invention;
FIG. 3 is a schematic diagram of a layer two link system according to an embodiment of the present invention;
FIG. 4 is a flowchart of a second embodiment of a method for link backup in an embodiment of the present invention
Fig. 5 is a schematic structural diagram of a link backup apparatus according to an embodiment of the present invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
The link backup method provided in the embodiment of the invention can be applied to the link backup of a layer two link system, and the layer two link system comprises the following steps: n layer two links; the N layer two links comprise an active link and at least one backup link, and N is an integer greater than 1.
Fig. 2 is a flowchart of a first embodiment of a method for link backup in an embodiment of the present invention, as shown in fig. 2, the method includes:
step 201: and when the main link is detected to have a fault, acquiring the state information of the backup link.
Before the step, the method can also comprise the following steps: and acquiring a configuration file of the layer two link system, wherein the configuration file at least comprises the identification information of the backup link. Here, the configuration file is used for detection of the backup link state, and switching of the backup link.
Accordingly, the step may include: and detecting the state of the backup link according to the backup link identification information contained in the configuration file to obtain the state information of the backup link. Namely, generating a detection message when the main link fails; and sending the detection message to each backup link, and if the detection message can be normally transmitted on the backup link, determining the backup link as an available link. Here, the state information includes: an available state and an unavailable state.
In practical implementation, the layer two link system may further include: a first device and a second device connected by N layer two links; wherein the first device comprises: a main port and at least one backup port; the main port corresponds to a main link, and each backup port corresponds to a backup link; one end of the main link is connected with a main port of the first equipment, and the other end of the main link is connected with a main port of the second equipment; one end of each backup link is connected with the corresponding backup port on the first device, and the other end of each backup link is connected with the backup port of the second device.
Correspondingly, the identification information of the backup link may specifically include: a backup port number of the first device and an address of the second device; and the first equipment is connected with the second equipment through a backup link corresponding to the backup port. For example, according to the backup port number of the first device and the address of the second device, the detection message is sent from the backup port of the first device to the second device through the backup link, so that the second device returns a response message when receiving the detection message; based on the response message, it is determined whether the backup link is available.
Specifically, the backup link receiving the response message is marked as an available state; and marking the backup link which does not receive the response message as an unavailable state.
Step 202: an available backup link is determined based on the state information of the backup link.
For example, the method for determining the available backup link may include: any one of the available backup links is determined from all available backup links, or the first detected available backup link is determined.
Step 203: and switching the current working link from the active link to the determined available backup link.
Illustratively, any backup link is selected from the backup links with the available state, and the working link is switched from the active link to the determined available backup link.
Here, the layer two link system may further include: at least one layer two device connected with each layer two link. The method for backing up the cascade link aiming at the multiple devices provided by the embodiment of the invention solves the problems that the backup can only be realized between the multiple ports of two devices and the backup can not be carried out aiming at the cascade link of the multiple devices in the prior art.
For example, the layer two link may be an uplink link and a downlink link in a metro convergence layer, and the layer two device may be a switch device located in the convergence layer. The first device may be a multi-port device, such as: a multi-port base station; the second device may be a convergence device, and the convergence device is configured to converge and transmit the multiple paths of data output by the multi-port device, so that the layer two link system formed thereby can implement layer two device cascade and layer two link backup.
Fig. 3 is a schematic diagram of a composition structure of a layer two link system in an embodiment of the present invention, and as shown in fig. 3, the layer two link system includes: a multi-port device 301, N layer two links 302, and a convergence device 303; the N layer two links 302 specifically include: layer two link 1, layer two link 2 to layer two link N; assuming that the layer two link 1 is a primary link, the layer two link 2 to the layer two link N are backup links, at least one layer two device is cascaded on each layer two link, and the layer two links are isolated from each other to avoid loopback. The multi-port device 301 specifically includes one active port and at least N-1 backup ports, the multi-port device 301 is connected to the aggregation device 303 through N layer two links 302, and the aggregation device 303 aggregates information on the N layer two links and then transmits the information. When the layer two link 1 fails, sequentially detecting a layer two link 2 to a layer two link N to determine a normal backup link; or simultaneously detecting the layer two link 2 to the layer two link N, marking all normal backup links, and selecting any one to perform backup link switching operation.
In this embodiment of the present invention, a method for backing up a link provided in this embodiment of the present invention is applied to a link backup of a layer two link system, where the layer two link system includes: n layer two links; the N layer two links comprise a main link and at least one backup link, and N is an integer greater than 1; the method comprises the following steps: when detecting that the main link fails, acquiring state information of a backup link; determining an available backup link according to the state information of the backup link; and switching the current working link from the active link to the determined available backup link.
By adopting the technical scheme, the link backup of the cascade type layer two link can be realized, each layer two link comprises at least one layer two device, and the problem that the backup can only be realized between two devices and multiple ports and the backup can not be carried out on the cascade type links of multiple devices in the prior art is solved.
Second embodiment
To further illustrate the object of the present invention, the first embodiment of the present invention is further illustrated.
Fig. 4 is a flowchart of a second embodiment of a method for link backup in an embodiment of the present invention, where the method includes:
step 401: and acquiring a configuration file of the layer two link system, wherein the configuration file comprises a backup port set and an address set of the target equipment.
Illustratively, a backup port set of a first device and an address set of a second device are obtained; and establishing a configuration file by using the backup port set and the address set. Here, the second device is a target device to which the transmission data arrives, and the second device may specifically be the aggregation device shown in fig. 3, or a device to which the transmission data arrives after the aggregation device. The second device may be a layer two device or a layer three device. Here, the layer two device refers to a device in a convergence layer in a metropolitan area network, and the layer three device refers to a device in an access layer in the metropolitan area network.
In actual implementation, a configuration file is established by the base station to generate a backup port set and an address set of the target device. The backup port set may specifically include all backup port numbers in the first device, and the address set may collectively include IP addresses of all second devices.
Step 402: and when the main link fails, generating a detection message, and transmitting the detection message to the target equipment through the backup link.
In actual implementation, the Detection packet may be a link Detection packet formed by an ARP (Address Resolution Protocol), an ICMP (Internet Control Message Protocol), a BFD (Bidirectional Forwarding Detection), and other protocols.
Specifically, the backup port of the first device and the address of the target device are determined through the configuration file, and the backup link realizes the connection between the backup port of the first device and the target device; sending a detection message from a backup port of the first equipment, and sending the detection message to target equipment through a backup link connected with the backup port; the target device generates a response message when receiving the detection message from a certain backup link, and sends the response message to the first device from the backup link.
Optionally, the method for detecting the backup link may be: and simultaneously detecting all backup links, namely simultaneously sending a detection message to the target equipment, or sequentially detecting each backup link according to the sequence of the backup ports in the configuration file.
Step 403: whether a response message returned by the target device is received within a preset time, if so, executing a step 404; if not, step 406 is performed.
Step 404: and marking the backup link receiving the response message as an available state.
In actual implementation, the backup port of the first device that received the response message may be marked as available. It should be noted that the backup port is associated with the backup link, and marking the backup port is available means marking the corresponding backup link is available.
Optionally, before checking whether the backup link is normal, the method further includes: it is checked whether the backup port is available and if the backup port is not available, the corresponding backup link is definitely not available.
Step 405: and determining an available backup link, and switching the current working link from the active link to the available backup link.
Specifically, the available backup links may be: any one of the available backup links, or the first detected available backup link.
Step 406: and marking the backup link which does not receive the response message as an unavailable state.
Third embodiment
For the method of the embodiment of the present invention, an embodiment of the present invention further provides a link backup apparatus, which is applied to link backup of a layer two link system, where the layer two link system includes: n layer two links; the N layer two links comprise an active link and at least one backup link, and N is an integer greater than 1.
Fig. 5 is a schematic diagram of a structure of a link backup apparatus according to an embodiment of the present invention, and as shown in fig. 5, the link backup apparatus 50 includes: a processor 501 and a memory 502; wherein the content of the first and second substances,
the processor 501 is configured to execute the link backup program stored in the memory 502 to implement the following steps:
when detecting that the main link fails, acquiring state information of a backup link;
determining an available backup link according to the state information of the backup link;
and switching the current working link from the active link to the determined available backup link.
In actual implementation, the processor 501 is further configured to execute the program stored in the memory 502 to implement the following steps: acquiring a configuration file of a layer two link system, wherein the configuration file at least comprises identification information of a backup link; and detecting the state of the backup link according to the backup link identification information contained in the configuration file to obtain the state information of the backup link.
In practical implementation, the layer two link system further includes: a first device and a second device connected by N layer two links; the identification information of the backup link includes: a backup port number of the first device and an address of the second device.
Specifically, the first device includes: a main port and at least one backup port; the main port corresponds to a main link, and each backup port corresponds to a backup link; one end of the main link is connected with a main port of the first equipment, and the other end of the main link is connected with a main port of the second equipment; one end of each backup link is connected with the corresponding backup port on the first device, and the other end of each backup link is connected with the backup port of the second device.
Illustratively, the link backup apparatus 50 may be located in the first device, and the detection and switching of the backup link are implemented by the first device.
In practical implementation, the processor 501 is specifically configured to execute the program stored in the memory 502 to implement the following steps: according to the backup port number of the first device and the address of the second device, the detection message is sent to the second device from the backup port of the first device through the backup link, so that the second device returns a response message when receiving the detection message; based on the response message, it is determined whether the backup link is available.
In practical implementation, the processor 501 is specifically configured to execute the program stored in the memory 502 to implement the following steps: marking the backup link receiving the response message as an available state; and marking the backup link which does not receive the response message as an unavailable state.
In practical applications, the Memory may be a volatile Memory (volatile Memory), such as a Random-Access Memory (RAM); or a non-volatile Memory (non-volatile Memory), such as a Read-Only Memory (ROM), a flash Memory (flash Memory), a hard disk (HDD), or a Solid-State Drive (SSD); or a combination of the above types of memories and provides instructions and data to the processor.
The Processor may be at least one of an Application Specific Integrated Circuit (ASIC), a Digital Signal Processing Device (DSPD), a Programmable Logic Device (PLD), a Field Programmable Gate Array (FPGA), a Central Processing Unit (CPU), a Digital Signal Processor (DSP), a controller, a microcontroller, and a microprocessor. It will be appreciated that the electronic devices used to implement the processor functions described above may be other devices, and embodiments of the present invention are not limited in particular.
Fourth embodiment
Based on the same inventive concept, embodiments of the present invention also provide a computer-readable storage medium, such as a memory including a computer program, which is executable by a processor of a terminal to perform the method steps in one or more of the foregoing embodiments.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of a hardware embodiment, a software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.
The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart block or blocks and/or flowchart block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks and/or flowchart block or blocks.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.
Claims (10)
1. A method for link backup, the method being applied to link backup of a layer two link system, the layer two link system comprising: n layer two links; the N layer two links comprise a main link and at least one backup link, and N is an integer greater than 1; the method comprises the following steps:
when detecting that the main link fails, acquiring state information of a backup link;
determining an available backup link according to the state information of the backup link;
and switching the current working link from the active link to the determined available backup link.
2. The method of claim 1, wherein prior to detecting the active link failure, the method further comprises: acquiring a configuration file of the layer two link system, wherein the configuration file at least comprises identification information of a backup link;
the obtaining of the state information of the backup link includes: and detecting the state of the backup link according to the backup link identification information contained in the configuration file to obtain the state information of the backup link.
3. The method of claim 2, wherein the layer two link system further comprises: the first device and the second device are connected through the N layers of second links;
the identification information of the backup link includes: a backup port number of the first device and an address of the second device.
4. The method according to claim 3, wherein the detecting the state of the backup link according to the backup link identification information included in the configuration file, and obtaining the state information of the backup link comprises:
sending a detection message from a backup port of first equipment to second equipment through a backup link according to a backup port number of the first equipment and an address of the second equipment, so that the second equipment returns a response message when receiving the detection message;
determining whether a backup link is available based on the response message.
5. The method of claim 4, wherein determining whether a backup link is available based on the response message comprises:
marking the backup link receiving the response message as an available state;
and marking the backup link which does not receive the response message as an unavailable state.
6. A link backup apparatus, which is applied to a link backup of a layer two link system, the layer two link system comprising: n layer two links; the N layer two links comprise a main link and at least one backup link, and N is an integer greater than 1; the device comprises: a processor and a memory; wherein the content of the first and second substances,
the processor is configured to execute the program stored in the memory to perform the steps of:
when detecting that the main link fails, acquiring state information of a backup link;
determining an available backup link according to the state information of the backup link;
and switching the current working link from the active link to the determined available backup link.
7. The apparatus of claim 6, wherein the processor is further configured to execute a program stored in the memory to perform the steps of:
acquiring a configuration file of the layer two link system, wherein the configuration file at least comprises identification information of a backup link;
and detecting the state of the backup link according to the backup link identification information contained in the configuration file to obtain the state information of the backup link.
8. The apparatus of claim 7, wherein the layer two link system further comprises: the first device and the second device are connected through the N layers of second links; the identification information of the backup link includes: a backup port number of the first device and an address of the second device.
9. The apparatus of claim 8, wherein the processor is specifically configured to execute a program stored in the memory to perform the steps of:
sending a detection message from a backup port of first equipment to second equipment through a backup link according to a backup port number of the first equipment and an address of the second equipment, so that the second equipment returns a response message when receiving the detection message;
determining whether a backup link is available based on the response message.
10. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 5.
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| PCT/CN2019/088014 WO2020001204A1 (en) | 2018-06-28 | 2019-05-22 | Link backup method and device, and computer readable storage medium |
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| CN201810691880.XA CN110661702B (en) | 2018-06-28 | 2018-06-28 | Link backup method and device and computer readable storage medium |
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| WO2020001204A1 (en) | 2020-01-02 |
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